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Pneumatic Dust Control in Grain Elevators Guidelines for Design Operation and Maintenance (1982) / Chapter Skim
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Appendix C: Results of an Experiment to Determine Whether Dust Suspensions in Bucket Elevator Legs Can Be Kept Below the Lower Explosive Limit by Pneumatic Means
Pages 103-108

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From page 103...
... to compare the results obtained by taking aspiration from the boot-top, which creates turbulence in the boot and base of the up-leg, as opposed to taking aspiration from the sides of the up-leg, which provides a more laminar air sweep of the boot and is in accord with the natural aerodynamics of the leg. The indications obtained from these tests are significant.
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From page 104...
... 60_" And RPM 44_ Belt Speed 691 FPM And Width J>4"" Bucket Size _ * " - Spacing _lpl" _Centers Bucket Make Maxi Lift Casing Size _10"x.28" 4 _3QVMGL"._ Feed Side Of Leg Down ll" x 8' Double Row ' Product Handled jf2 Yellow Corn Product Moisture l2..2 to.
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From page 106...
... n Suction Up Side Of Leg W Suction Top Of O Bool And Up Side Of Leg 10 Dust Concentration In Grams Per Cubk Meter i0 1 \ 0 • a) Sample Point #1 i 2 J < 5 Dust Contfol Aspiration in l.000 CFM b)
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From page 107...
... TEST PROCEDURE TO DETERMINE DUST CONCENTRATION IN BUCKET ELEVATOR A Determine air volume being drawn from bucket elevator a.
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From page 108...
... CFM = Area Ft.2 x Velocity ft/min. STATC PRESSURE READING VELOCITY READING IN FPM /-VELOCITY PRESSURE READING IN INCHES OP WATER TOTAL PRESSURE READING FIGURE C-4 Use of pitot tube and velometer.
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Key Terms

  • pressure reading
  • explosive limit
  • bucket elevator
  • dust concentration
  • preliminary data

  • taking aspiration
  • square feet
  • pulley dia
  • suction location
  • belt speed

  • flow schematic
  • below suction
  • velocity stated
  • insert probe
  • nnn nnu

  • air temperature
  • duct stated
  • testing procedure
  • yellow corn
  • natural aerodynamics

  • relative humidity
  • slip form
  • normally refer
  • reading figure
  • various volumes

  • cubk meter
  • leg casing
  • elevator test
  • statc pressure
  • product moisture


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